The properties of the glasses in the Na2O-K2O-CaO-BaO-SiO2 system

The viscosity, liquidus and glass transition temperatures, refractive index , and the hydrolytic resistance are reported for 15 glass samples of the ti tle glass system. Using the non-linear regression analysis, the temperature and compositional dependence of viscosity was expressed by the mixed polyn omial representation (of the individual oxides mole fractions) of the A, B and T-o coefficients of the Vogel-Fulcher-Tammann equation The compositiona l dependencies of the other properties studied were described by the mixed polynomials of both the weight and mole fractions of individual oxides. The obtained results were used in two ways i) the glass composition optimizati on with respect to the lowering of the stemware glass production cost; ii) the structural role of the individual oxides estimation based on their infl uence on the studied properties. The present work illustrates the possibili ty and methodology of the simultaneous use of the same experimental data se t for both technological and fundamental research.